Do Semi-Arid Landscapes in the American Southwest Cause Discrete Communities of Caddisflies (Trichoptera) in Streams?

Dean W. Blinn; David E. Ruiter; Allen Haden

doi:10.1894/0038-4909-57.1.119

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Dean W. Blinn,^1,* David E. Ruiter,² Allen Haden³

¹Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011 (DWB)
²6260 South Grant Street, Centennial, CO 80121 (DER)
³Natural Channel Design, Inc., 206 South Elden Street, Flagstaff, AZ 86001 (AH)

^*Correspondent: deandiacad@comcast.net

Abstract

Fragmentation of habitats and distance between drainages in the semi-arid Lower Colorado River Basin has contributed to development of disjunct populations of caddisflies in the region. Caddisflies in streams cluster into discrete regional assemblages in the basin with significantly different assemblages. Distances between drainages in Arizona will likely increase genetic drift in disjunct populations of caddisflies and further reduce genetic variability, which may be important in conservation.

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Dean W. Blinn, David E. Ruiter, and Allen Haden "Do Semi-Arid Landscapes in the American Southwest Cause Discrete Communities of Caddisflies (Trichoptera) in Streams?," The Southwestern Naturalist 57(1), 119-122, (1 March 2012). https://doi.org/10.1894/0038-4909-57.1.119

Received: 5 March 2010; Accepted: 1 June 2011; Published: 1 March 2012

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